Clare Craig does some analysis of a paper that supposedly showed high risk for myocarditis in covid patients.

Dr. Craig looked at the supplementary data in the paper’s appendix.

Using the fact that 62% of the Covid cohort were vaccinated and that the unvaccinated had a rate of 370 per million, to get to an overall rate of 500 per million the vaccinated 62% must have had a rate of 580 per million (580×0.62 + 370×0.38 = 500). Therefore, in those with Covid and vaccination the rate (even after modelling) was 210 per million higher (58% higher) than the unvaccinated with Covid. (If supplementary Table 22 did exclude the unvaccinated the incidence of myocarditis after Covid would have been 35% higher in the vaccinated.) An extra 210 per million works out as an additional risk from vaccination of one in 5,000 among a relatively old population. The 35-58% higher myocarditis…